Sterilizing apparatus



D. G. WILL STERILI Z ING APPARATUS Jun 5, 1928.

Filed Nov. 17, 1924 Tr p; 7.

a I L lm I Am W do INVENTOR ATTORNEY tact plate'29issecured n the block,"-which plate has engagement with a contact mem ber 30, that depends from the bottom of the base of the housing, when the bar isin locked engagement with the lever.. .Thecon- 1 tact plate 29 and the heating coil 16 are electrically united by a conductor31, and the coil 17 of the thermostat is electrically united through the medium of a bolt 32'a'nd conductor .33. The heating coil is electrically united with a termina'l post 34 .by 'means of a conductor 35, and the coil 17 of the thermostat is electrically united with another terminal post 86 by means of a confduct'or 3 7,'sai'd terminal posts being connected IGSPQCtlVBlY by means of conductors 38 with. a-suitable sourceof electrical energy (not shown) V A retracting spring 39 has at oneof its in a stationary bracket 42has' a bifurcated arm 43 which is engaged with a stud 44 on the block 28, so that when the bar 24 is. moved outwardly, the lever 41 is moved upwardly and lifts the valve 3'by engagement withjthe lower end of the stem thereof.

In the operation of the invention water is supplied to the ves'sel'l through the supply pipe 14 by turning the valve manually to the: position shown in Fig.1., Vihenthe V valveis thus turned the cam '27 acts against 3 the head of the bar 24 causing the bar to ='I 'nove inwardly so that its lug passesfthe.

hook 21 on the lever19; The extension'of f the springd23 raises the-lever so that the ref hook engages the lug 25 and thus arrests outward movement of the bar 24, \Vhen the the overflow therefrom passing out through the pipe 11, the valve 15 is manually closed and the cam- 27 is correspondingly moved out of engagement with the bar 24"while' the bar is held locked in its innermost posi-- tion and the plate 29in electrical contact with the contact member 80,wl1ich plate and' 'contact member functionas an electrical switch forclosing the electrical "circuit '-.throughthe coils of the heating memberand thethermostat. While the switch is thus held in closed position, the coils are enei gized the current, passing.therethrough, and the consequent heat of the heating member isimpartedto the vessel l'jsothat the x temperature of its contents ofwater is raised; I and simultaneously therewith the bar v18 of .the thermostat 'is likewise heated by the action of .its coil. As the temperature of the 1 bar is raised, it becomes expanded length-1 .wise and bears downwardly upon the lever 19 which is moved to a stage sufliciently'low as to cause its hook 21 to release its locked engagement with thelug on the movable bar, which-when thus released permits the bar to be moved outwardly. to its normal position by the action of the's pring 39. The electrical switchis' opened by the outward move-v ment of the bar and consequently the flow of current through the coils is shut oil. Also, as the bar 24"is moved to its outer position, the lever 41 is raised and'theva'lve '3 in 'thev'essel is consequentlyopenedwhich permits the heated water in the vessel to drain therefrom. -By ad ust1ng the screw 22 so as to increase or decrease the pressure of the spring 28 against the lever 19, and by adjustably raising or lowering the position of the expansion i'od-18, the period of the release fronrlockedengagement of the movable bar 24 may be. more or less deferred and the water in the vessel accordingly retained'therein until the desired temperature mented bythelag'ging heat'of the heating element.

Disinfectant is introduced into the vessel from the receptacle8 which is filledwith any suitable disinfect-ant in liquid form and whichj passes therefrom into the cup 7 when the level of liquidin the cup is lowered therein sufiiciently'as' to admit air into the nozzle through itsbpen'ing 10. The flow of the liquidfdisinfeotant into the 'cupis V automatically stopped by the rise of liquid. vessel is'filled with water, as isindicated by i let; a valve controlled supply pipe for filling thevessel with liquid; an electrical heating coil for the vessel; a spring resisted electrical switch; a latch member engageable with the switch and operable to holdthe switch'in closed position; anelectrical.

thermostat having, operable relation with said latch and connected in electrical circuit with said switch? and heating coil;

means in" connection with the'valve control'g ling the supply pipe engageable with the switch and operable to'close the switch when the valve .is turned open; means actuated bythe switch operable'toopen the valve of the drain outlet when the switch is opened;

and meansfor automatically supplying dis: infectant in limited quantities to the vessel.

2. In apparatus of the class described, a vessel for containing liquid having a valve controlleddra-in outlet and an overflow outlet; a valve controlled supply pipe for filling the vessel with liquid; an electrical heat ing coil for the vessel; a spring resisted electrical switch; a latch member engageable with the switch and operable to hold the switch in closed position; an electrical thermostat having operable relation with said latch and connected in electrical circuit with said switch and heating coil; means in connection with the valve controlling. the supply pipe engageable with the switch and operable to close the switch when the valve is turned open; and means actuated by the switch operable to open the valve of the drain outlet when the switch isopened.

3. In combination with a vessel having a valve controlled drainoutlet and an overflow outlet; a valve controlled supply means for filling the vessel; an electrical heating means for the vessel including a 7 switch therefor; a. thermostatically controlled latch for holding said switch in closed position 'mea-ns actuated by the valve on the supply pipe operable to close said switch; and means operable to hold the valve of the drain outlet open while said switch is open.

4. In apparatus of the class described including a vessel having 'avalve controlled drain outlet and a valve controlled filling means, an electric heater for the vessel, a thermostat including a second electric heater; a thermostat operated by said second heater, there being an electric circuit connecting said heaters in series; and a latch detained switch member controlling said circuit, and also the valve of said drain outlet, and having actuated relation with the valve of said filling means, said thermostat having operable relation with the latch of said switch member.

5. An appliance of the class described comprising a vessel; a valve controlled means for supplying the vessel with liquid; a. thermostat; an electrical heating means, aflecting the vessel and thermostat including an electrical switch therefor; a latch operable to hold said switch in closed position, and controlled by said thermostat; and means for automatically closing said switch upon operation of said filling means.

6. An appliance of the class described comprising a vessel; a valve controlled means for supplying the vessel with liquid; a thermostat; an electrical heating means, alfecting the vessel and thermostat including an electrical switch therefor; a latch operable to hold said switch in closed position, and controlled by said thermostat; means for automatically closing said switch upon operation of said filling means; and means for automatically draining the vessel when said switch is opened.

I In testimony whereof, I aflix my signature.

DORIS G. WILL. 

